Properties of films obtained by UV-curing 4,4'-hexafluoroisopropylidenediphenoldihydroxyethylether diacrylate and its mixtures with the hydrogenated homologue
✍ Scribed by R. Bongiovanni; G. Malucelli; A. Pollicino; A. Priola
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 141 KB
- Volume
- 63
- Category
- Article
- ISSN
- 0021-8995
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✦ Synopsis
A new ultraviolet (UV)-curable acrylic monomer, 4,4-hexafluoroisopropylidene-diphenoldihydroxyethylether diacrylate, was synthesized: it was cured as a film and its properties compared with those of its fully hydrogenated homologue. The introduction of two CF 3 groups into the monomer did not change its reactivity in the UVcuring reaction, but increased the glass transition temperature ( T g ) of the cured polymeric film, decreased its refractive index (n), and lowered its surface tension. The fluorinated and the hydrogenated monomers were completely miscible and give homogeneous films: the T g and n values were found linearly dependent on the fluorinated monomer content. The surface properties were deeply influenced by the presence of fluorine; a surface enrichment of the fluorinated monomer was evidenced by X-ray photoelectron spectroscopy analyses on the surfaces of the films obtained from mixtures of the two monomers.